<!DOCTYPE html>
<html lang="zh">
  <head>
    <meta charset="utf-8">
    <link rel="stylesheet" href="style.css">
    <title>跷跷板加载动画</title>
  </head>
  <body>
    <div class="app">
      <div class="loading73"></div>
    </div>
  </body>
</html>

<style>
    .app{
        width: 100%;
        height: 100vh;
        background-color: #ffffff;
        position: relative;
        display: flex;
        justify-content: center;
        align-items: center;
    }
    .loading73{
        width: 80px;
        height: 80px;
        position: relative;
        display: flex;
        justify-content: center;
        align-items: center;
        transform-origin:center center;
        animation: effbox73 3s cubic-bezier(0, 0.6, 1, 0.4) infinite;
    }
    @keyframes effbox73{
        0%{
            transform: rotate(-30deg);
        }
        40%{
            transform: rotate(30deg);
        }
        50%{
            transform: rotate(30deg);
        }
        90%{
            transform: rotate(-30deg);
        }
        100%{
            transform: rotate(-30deg);
        }
    }
    .loading73::before{
        content: '';
        width: 100%;
        height: 4px;
        background-color: #000;
        position: absolute;
        left: 0;
    }
    .loading73::after{
        content: '';
        width: 16px;
        height: 16px;
        background-color: #089f1f;
        position: absolute;
        top: 21px;
        left: 0;
        border-radius: 3px;
        animation: eff73 3s ease-in-out infinite;
    }
    @keyframes eff73{
        0%{
            transform: translateX(0) rotate(0);
        }
        10%{
            transform: translateX(16px) rotate(90deg);
        }
        20%{
            transform: translateX(32px) rotate(180deg);
        }
        30%{
            transform: translateX(48px) rotate(270deg);
        }
        40%{
            transform: translateX(64px) rotate(360deg);
        }
        50%{
            transform: translateX(64px) rotate(360deg);
        }
        60%{
            transform: translateX(48px) rotate(270deg);
        }
        70%{
            transform: translateX(32px) rotate(180deg);
        }
        80%{
            transform: translateX(16px) rotate(90deg);
        }
        90%{
            transform: translateX(0) rotate(0);
        }
        100%{
            transform: translateX(0) rotate(0);
        }
    }
</style>
